The 22-year-old Hunger Games star tells the new edition of U.S. Elle that she has a healthy appetite - and would never starve herself for a film role.
She also says that by Hollywood standards, she is considered 'a fat actress'.
Stunning shoot: Jennifer Lawrence graces the pages of the new edition of Elle U.S. where she opens up about dieting and her personal life
'I’m Val Kilmer in that one picture on the beach,' she added, referring how the once-buff Kilmer has piled on the pounds over the years.
She goes on to discuss her eating habits: 'I eat like a caveman. I’ll be the only actress who doesn’t have anorexia rumors.'
And she says not even a film role could persuade her to shed weight - so won't be following in the footsteps of starlets such as Mila Kunis, Natalie Portman and Anne Hathaway.
Strike a pose: The actress insists she is considered a 'fat actress' by Hollywood standards
Role model: Lawrence says she doesn't want to set a bad example to her fans and would refuse to get super skinny for a film role
Jennifer explained: 'I'm never going to starve myself for a part. I keep waiting for that one role to come along that scares me enough into dieting, and it just can’t happen. I'm invincible.'
The actress says she wants to be a good role model for her fans, sharing: 'I don’t want little girls to be like, "Oh, I want to look like Katniss, so I’m going to skip dinner."'
Cover girl: Jennifer fronts the December issue of the fashion magazine
Elsewhere during the interview, Lawrence lifts the lid on her relationship with her British actor boyfriend Nicholas Hoult.
She gushed: '[My boyfriend] is honestly my best friend, and hopefully I’m his best friend too. He’s my favorite person to be around and makes me laugh harder than anybody.'
Jennifer goes on: 'We can eat Cheetos and watch beach volleyball and we turn into two perverted Homer Simpsons, like, "Oh, she’s got a nice ass." I never thought we’d have such different opinions on asses.'
Lawrence also admits to having something of a foot-in-mouth syndrome.
'I never know what’s going to come out of my mouth, and it’s horrible. I don’t find it positive in any way.
'When I get older, I’ll be more mature and poised. And I’ll have control over my mouth.
'One day, I’m going to grow up…When we leave [the interview] I'm going to have a knot in my stomach. I'm going to be like, "Oh, did I say something wrong? I’m going to get in trouble!"'
Jennifer also appears to reveal how much she is worth - but says she still lives modestly.
'Ten million dollars and I’m still living in my parents' condo,' she tells the fashion magazine.
'I've always lived in a tiny rat-infested apartment in New York, or a little condo in LA, or a normal house in Kentucky. I think it would be very bizarre to live in a big mansion by myself.'